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Last reply by 07-21-2017 Unsolved
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1 Copper
1 Copper
14354

Optiplex 780 diagnostic lights 1 & 4 with solid amber power light

My Optiplex 780

- will not post

- will not beep

- will not output any video

When I push the power button, 

- Diagnostic lights 1 & 4 flash

- Power button is of solid amber

When I turn the computer off:

- if I press the Power Supply test button, it illuminates green

If I disconnect the power cable

- A tiny LED on the circuit board (next to AUX PWR label) stays amber for a minute or two.

Diagnostic lights 1 & 4 are not documented in the Dell manual. I have tried to disconnect all peripherals, all drives, all cards, even all RAM, still no POST no beep, no video: just the fan running, and diagnostic lights flashing.

Any hope for this computer? 

Replies (4)
5 Tungsten
11276

Hi CHRISTOZOID 

Thanks for writing to us. 

Diagnostics led 1 & 4 indicate power connector faulty. Please reseat the PSU connector if not yet done. 

If issue still the same, then consider replacing the PSU . Sometimes the PSU connector on the motherboard to be faulty. 

Do let us know how it goes post reseating the PSU connector.

Regards

DELL-Hemalatha P
Social Media Support
#IWork4Dell
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5 Tungsten
11276

Hi we are awaiting your response.

DELL-Hemalatha P
Social Media Support
#IWork4Dell
Dell Support Videos 
Drivers and Downloads

2 Bronze
2 Bronze
11276

i have dell optiplex 780. i have a problem of solid amber light.I have cleaned ram,cleaned  CMOS but problem continues  how can i solve it?pc turns on,fans are working normally but no display on the monitor

10 Diamond
11276

Solid Amber Power Button is Bad Motherboard.

You did not say which SIZE you have.


The Optiplex 990 says this.


1    4   MBF (Motherboard Failure) is well documented.


 


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